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Dec. 11, 1923.

J. F. FAUST AUTOMATIC CONTROL Filed Nov. 18. 1920 2 Sheets-Sheet 1 altozwzw Dec. 11,1923. 1,477,216

J. F. FAUST AUTOMATI C CONTROL Filed Nov. 18 1920 2 Sheets-Sheet ZW/7/Vf358 v gin-0011101,

( Jmr fi/zasr Patented Dec. 11, 1923.

UNITED STATES PATENT OFFICE.

JOHN F. FAUST, OF WAPAKONETA, OHIO, ASSIGNOR TO NEW WAY LABORATORIESCOMPANY, OF GREENVILLE, OHIO, A CORPORATION OF OHIO.

AUTOMATIC CONTROL.

Application filed November 18, 192 Serial No. 425,024.

I wlzom it may concern:

Be'it known that I, JOHN F. FAUST, a citizen of the United States,residing at \Vapakoneta, in the county of Auglaize and State of Ohio,have invented certain new and useful Improvements in an AutomaticControl, of which the following is a speci fication.

This invention relates to improvements in means for controlling theoperation of machines that draw in a fiuid in a gaseous or vaporousstate and at a low pressure, compress it and force it at high pressureinto a condenser where the heat of compression is carried away by a flowof cooling water. The compressing machine employed will be operated byan electric motor and the principal object of this invention is to openand close an electric circuit for starting and stopping the motor atproper intervals. Another object of the invention is to properlyregulate the flow of the cooling water so that the starting andcontinued operation of a compressing machine is dependent upon the flowof an adequate suppl of cooling water, that the flow of the coo ingwater is automatically so graduated as normally to maintain apre-determined head or condenser pressureand that in case of anexcessive operating pressure, tending to become dangerous, the operationof the machine will be interrupted. A still further object of theinvention is to generally improve upon automatic controlling means ofthis character by providing an apparatus which will be of extremelysimple, durable, compact, and inexpensive construction, one which iseflicient and reliable in operation and well adapted to the purpose forwhich it is designed.

With the above and numerous other objects in view this inventioncomprises certain novel features of construction,.combination andarrangement of parts as will be hereinafter more fully described.

In the drawing:-

Figure 1 is a view, partially in front elevation and partially insection of the device,

Figure 2 is a top plan view of the device,

Figure 3 is a horizontal longitudinal section through the device,

Figurea is a vertical transverse section through the device, and

Figure 5 is a detailed'view showing the contact members of the switch.

Referrin to the drawin in detail, the reference c aracters 1 an 2respectively designate the bottom and top plates of a frame or standwhich carries the thermostatic mechanism, said plates being rigidlyconnected by bolts 3 passing through spacer sleeves 4 interposed betweenperipheral portions of said plates. The upper plate 2 is formed with acentrally located opening 5 normally closed by a removable door 6 sothat easy access may be had to the mechanism carried between the lateswhich will be later described. The be lows 7 and 8 are of the ordinarycorrugated expansible tubular construction and form heat responsiveelements. The brackets 9 and 10 support the bellows 7 and 8 upon theupper plate 2. The brackets 9 and 10 maybe of any preferred constructionand as here shown are the form of tripods having legs 11 depending fromarms 12 which radiate from a body 13. This body 13 is rovided with anaperture for receiving t e neck of a bellows. Apertured feet 14 areprovided on two legs of each of said brackets so as to receive'bolts 3.An enlarged foot 15 is rovided on the remaining leg and is suitab ybolted to the plate 2. The neck 16 of bellows 7 is adapted to be incommunication with a suitable thermostat in a refrigerating system whilethe neck '17 of the bellows 8 is adapted to be in communication with thecompressor of a refrigerating system. The bellows 7 is disposed over anopening 18 and the bellows 8 is disposed over an opening 19 provided inthe plate 2. Each bellows is connected to a stem 20 by means of a yoke21. An upstandin threaded member 22 is mounted on the flower plate 1 andis normally received within the stem. 20 which is of hollowconstruction. A nut 23 is threadedly mounted upon the upstanding member22 and a coil spring of the expansion type 24 is disposed around thestem 20 between the yoke 21 and the nut 23 so that the tension of thisspring 24 may be regulated by screwing the nut 23 so as to raise orlower same in a well known manner. The springs 24 and their associatedparts form means for normally holding the bellows 7 and 8 in acontracted position and it will be readily 24 will be compressed and theyoke portion bifurcated so as to receive 21 moved downwardly.

A needle vave 25 of any preferred construction is suitably mountedbetween the plates 1 and 2 and has an intlet 26 and an outlet 27 whichwill be suitably connected or communicated with the refrigerating systerm for controlling the flow of a liquid tlierethrough. The valve stem28 extends upwardly from the needle valve 25. A pair of depending s acedparallel apertured ears 29 are situate on t e upper plate 2 and carrytherebetween the lever 30 by means of a pin 31. One end of this lever 30is suitably connected to the valve stem 28. The portion of the lever 30upon the side of the fulcrum opposite to that which is in connectionwith the valve stem 28 passes through the yoke 21 connected to thebellows 8. This portion of the lever 30 is pivotally connected to theyoke 21 by means of a pin 32. Thus it will be seen that the expansionand contraction of the bellows 8 will open and close and regulate theneedle valve 25 through the intermediacy of the lever 30 and the valvestem 28.

A snap switch is suitably situated on the lower plate 1 intermediate itsends and comprises a base 33 having insulating blocks 34 mounted thereonfor supporting the contact points 35 which are suitably connected towires 36 so that the electric circuit passing through the motor forrunning the compressing machine may be opened and closed in a mannerabout to be described. The circuit closing means consists of the springarms 37 which may be lifted in and out of engagement with the contactpoints 35. A standard 38 situated at one end of the base 33 pivotallysupports the arm 39. This arm 39 supports the springs arms 37 throughthe insulation 40. A second standard 41 is situated at the other end ofthe base 33 and pivotally supports a second arm 42 which is disposedabove the first arm 39. It will be noted that the pivoted end of the arm39 is the pivoted finger 44. This finger 44 is pivoted to the arm 39intermediate its ends. A leaf spring 45 is rigidly connected at one endto the arm 42 and is pivotally connected at its other end to the finger44. Thus it will be seen that when the free end of the finger 44 isbelow the arm 39 the spring arm 37 will be out of engagement with thecontact points 35 whereas when the free end of the finger 44 is a littleabove the arm 39 the spring arm 37 will be in engagement with thecontact points 35 so as to close the circuit therethrough.

bell crank lever 47 is suitably pivoted to the base 33 and one portionthereof is provided with a pair of hook members 48 which pass through anopening in the lever 39 and engage the edge thereof for holding the armportion ed to enga e the bell crank lever 47 so as to compress t espring 49 and release the hook member 48 thus allowing the arm 39 tomove upwardly.

A suitable pair of spaced parallel apertured cars 50 depend from theplate 2 adjacent the opening 18 and pivotally support the lever 51through the pin 52. One end of this lever 51 is in pivotal engagementwith the yoke 21 through a pin 53 while the other of the lever 51 isconnected to the arm 42 intermediate its ends through a link 54. It willbe noted that the lever 51 ex tends sufficiently toward the other end ofthe apparatus so as to terminate a relatively short distance under thelever 30. Thus it will be seen that the'expansion ofthe bellows 7 willcause the switch mechanism just described to be in a closed positionthrough mounted on the base 33 normalzy' the intermediacy of the lever51 and link 54'.

the lever 30 and thus the distance between the levers 51 and 30 may beregulated. It will be noted that upon a certain expansion of the bellows8 this inner end of the lever 30 will engage the inner end of the lever31 so as to force the lever 31 downwardly thus actuating the switchmechanism so as to open the same.

From the fore oing description, taken in connection with t eaccompanying drawing, the construction and operation of the appa ratuswill be readily understood without a more extended explanation.Obviously, the invention is not limited and restricted to the precise,and exact details of construction as illustrated and described, becauseit is susceptible of a variety of embodiments, and many minor mechanicalchanges may be made in such preferred incorporation of the inventionwithout departing from the substance or essence of the invention andwithout the sacrifice of any of its substantial benefits and advanta es.

Having thus descri ed the invention what is claimed as new is Incombination, a frame comprising spaced superimposed plates, a pair ofheat responsive elements mounted onthe upper pate, a lever pivotallymounted on the 111% der surface of the upper plate below each heatresponsive element so that their inner ends will overlap, means on onelever for In testimon whereof I afiix my signature regulatin the normaldistance between the in presence 0 two witnesses. inner en s of thelevers, said upper plate provided with an aperture registering with JOHNFAUST' said means so that it may be regulated, and a. Witnesses:

' switch mounted on the lower plate and eon- WM. J. GOUDY,

nected to one of said levers. 5 CARL T. Homes.

